I had a fun one recently - cooking for a crowd with several dietary restrictions: two vegan, one vegetarian, and another who was gluten-free. It ended up being a fun challenge to come up with a multi-course meal everyone could enjoy.
The vegan guests brought their own vegan cheese substitute, which was an interesting revelation - I had no idea such a thing existed! I played around with some ideas for the main course and landed on a deconstructed ratatouille. Everyone got their own individual cast iron skillet loaded with roasted veggies, some crusty gluten-free bread, and a generous helping of the vegan cheese.
It was a hit, and it turned out to be a great leveler as the other dishes across the table had to accommodate the same constraints, so nobody felt singled out. Turned a potential headache into a fun, inclusive experience for all!